Anna University, Chennai Nov/Dec 2012 Examinations

Rejinpaul.com Important Questions

ELECTRONIC
CIRCUITS-I EC2205

III Sem ECE

Unit I-V

1.
Derive
the stability factor for voltage divider bias

2.
Describe
how DC and AC load lines are drawn

3.
What
is meant by bias stability what are the factors affect the bias stability

4.
Explain
briefly about compensation technique

5.
Discuss
the operation of Differential amplifier

6.
Analyze
the small signal transistor amplifier in term of h parameter

7.
Draw the hybrid model
of CE configuration obtain its gain, input impedance compare the performance of
this amplifier with CC&CB configuration

8.
With
small equivalent circuit of emitter follower
derive its input impedance, Av , and output impedance

9.
Draw
the small signal model of FET and analyze source follower

10.Analyze Darlington
type input impedance increasing method

11.
Derive
the Expression for Ai, Av, Ri, and Ro for CE amplifier using h parameter model

12.Explain the methods
to improve the CMRR

13.
Draw
and explain class B push-pull power amplifier

14.Explain briefly
about Total Harmonic distortion

15.
Explain the power control method
using SCR

16.Prove that maximum
efficiency of class B power amplifier is 78.50%

17.
Explian the working
principle of class D amplifier what is its efficiency

18.Draw the block diagram of SMPS what are its
advantage

19.Draw .the Hybrid (pie) model of transistor and derive the various
parameters

20. Describe the working
principle of full wave rectifier and derive the expression for the ripple factor ,rectifier
efficiency,Vdc,Idc,Vrms,Irms?